GM Service Manual Online
For 1990-2009 cars only

Camshaft Cover Installation - Left Side LLT

Special Tools

    • EN 46101 Spark Plug Tube Seal Guide
    • EN-48383 Camshaft Retaining Tools

For equivalent regional tools, refer to Special Tools.


    Object Number: 1978177  Size: SH
  1. Remove the EN 48383-2 from the rear of the left camshafts.

  2. Object Number: 1978178  Size: SH
  3. Install the EN 46101 guide onto the spark plug tubes of the left cylinder head.

  4. Object Number: 1978179  Size: SH
  5. Install the NEW camshaft cover bolt grommets prior to installing the camshaft cover bolts.
  6. Wipe the camshaft cover sealing surface on the left cylinder head with a clean, lint-free cloth.

  7. Object Number: 1832348  Size: SH
  8. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, on the engine front cover split lines (1).

  9. Object Number: 1978180  Size: SH
  10. Place the left camshaft cover into position onto the left cylinder head.

  11. Object Number: 1978181  Size: SH
  12. Loosely install the left camshaft cover bolts.
  13. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1978182  Size: SH
  14. Tighten the left camshaft cover bolts in the sequence shown.
  15. 8.1. Tighten the left camshaft cover bolts in the sequence to 10 N·m (89 lb in).
    8.2. Tighten the left camshaft cover bolts a second pass in the sequence to 10 N·m (89 lb in).

    Object Number: 1978183  Size: SH
  16. Remove the EN 46101 guide from the spark plug tubes of the left cylinder head.

  17. Object Number: 1978184  Size: SH
  18. Install the NEW spark plugs into the left cylinder head and tighten to 20 N·m (15 lb ft)..

  19. Object Number: 1977863  Size: SH
  20. Install the ignition coils.

  21. Object Number: 1977859  Size: SH
  22. Install the ignition coil bolts and tighten to 10 N·m (89 lb in).